Rental Property Cash Flow: A Landlord’s Management Playbook

Rental property looks predictable, and most months it is. The difference between a portfolio that builds wealth and one that drains it is how the unusual months are handled: the void between tenants, the tenant who stops paying, the roof, the rate rise. This playbook sets out a landlord’s cash routine. For how rental cash flow works and a worked vacancy example, see the rental property cash flow forecast page.

The monthly routine

1. Rent received against the rent roll, unit by unit.
2. Arrears: any tenant late by more than a few days gets a contact the same week.
3. Upcoming lease ends in the next three months: renew, re-let or prepare for a void.
4. Repairs and maintenance: completed, planned and quoted.
5. Reserve balances: repairs, capital works, tax.
6. Next twelve months: the lowest balance, and months when tax, insurance or large works fall.

Rent roll and arrears control

Keep a rent roll with each unit’s rent, due date, lease end, deposit and payment history. Arrears grow quickly if left: a friendly reminder on day three, a call on day seven and a formal letter at fourteen days is more effective than waiting for month end. Payment plans agreed early usually recover more than disputes started late.

Vacancy planning

Every void costs rent plus utilities, council or property taxes, marketing and sometimes furnishing. Reduce it by:

• contacting tenants two to three months before lease end about renewal
• marketing before the current tenant leaves
• completing repairs between tenancies quickly
• pricing realistically; a month empty costs about 8 percent of annual rent

Forecast a realistic vacancy allowance, such as one month per unit every one to two years, rather than assuming full occupancy.

Reserves

Keep three separate reserves, ideally in separate accounts:

Transfer to each reserve monthly, as a fixed line in the forecast.

Mortgages and rates

For each mortgage, note the rate, whether it’s fixed or variable, and when any fixed period ends. Six to twelve months before a fix ends, forecast the payment at current rates and check each property still cash-flows. If not, plan: overpay, remortgage, raise rents where the market allows, or consider selling.

Deposits

Security deposits aren’t income. Record them separately, protect them where the law requires, and forecast their return at lease end along with any agreed deductions.

A worked year for a small portfolio

A landlord owns five flats bringing in $7,250 a month in rent when full. Mortgages total $3,100 a month, with two fixed rates ending in month nine. Management and running costs are about $900 a month.

The forecast includes one void of five weeks in month four, a boiler replacement of $3,200 in month seven, property tax installments in months three and nine, and monthly transfers of $600 to repairs, $400 to capital works and $500 to tax.

With these in place, the year still shows a positive balance every month, but month nine is tight: the property tax installment arrives in the same month the two fixed rates end and payments rise by $420 a month. Seeing this early, the landlord arranges new fixed rates three months before the old ones expire, avoiding a period on the lender’s higher standard rate, and reviews rents on the two affected flats at their next renewal.

Letting agents and management fees

If you use a letting or management agent, their fee is usually a percentage of rent collected, often around 8 to 15 percent depending on the service. Forecast it as a percentage of rent so it falls when rent falls. Check how quickly the agent passes rent on: a delay of a week or two between tenant payment and your receipt matters when mortgage payments are due on fixed dates. Agree the date in advance and forecast rent on that date.

Annual review

Once a year, for each property:

• cash flow after mortgage, running costs, vacancy and reserves
• rent against the local market
• condition and upcoming capital works
• mortgage terms and refinancing dates
• whether the property still meets your goals

Building the forecast

A landlord’s forecast is simple: one line of rent per property (or per unit, if you have a few), less a vacancy allowance, then mortgage, management, insurance, property taxes, utilities you pay, repairs, and the reserve transfers. Show each property’s net cash flow so weak performers stand out, and the total so you can see the portfolio’s lowest month. Update it monthly with actual rent received and costs paid.

Taxes on rental income

Income tax on rental profit is often paid once or twice a year, well after the rent arrived. Setting aside a percentage of each month’s profit in the tax reserve avoids a large bill landing on an already tight month. Your accountant can help set the percentage, which depends on your tax position and the rules where you live.

Warning signs

• Arrears rising or the same tenants repeatedly late
• Voids getting longer
• Reserves used for routine costs
• Fixed-rate periods ending without a plan
• Relying on one property’s income to cover another
• Personal and property money mixed in one account
• Repairs repeatedly postponed, which usually makes them more expensive

When cash gets tight

1. Chase arrears and agree payment plans.
2. Fill voids quickly, even at a slightly lower rent.
3. Defer non-urgent capital works, not safety repairs.
4. Talk to your lender early if payments will be difficult.
5. Review whether a weak property should be sold.

Tools

The premium Rental Property template includes a Rent Roll tab with occupancy by month, collection rate and management fees, an Annual Bills tab for property taxes and insurance, scenarios for voids and rate rises, and a dashboard. See also how much cash buffer to keep.